Cross layer path provisioning method and system in multi layer transport network

Abstract

Disclosed is an inter-layer path provisioning method and system in a multilayer network that may set, in response to a path setting request of an operator, an upper layer path to be interlocked with an upper layer path computation unit, set, separately from the setting of the upper layer path, a lower layer path to be interlocked with a lower layer path computation unit, and perform a connection between the set upper layer path and the set lower layer path, so that inter-layer path setting may be readily performed in a multilayer transport network.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of Korean Patent Application No. 10-2010-0101362, filed on Oct. 18, 2010, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to a technique that enables inter-layer path provisioning to be readily performed in a multilayer transport network.[0004]2. Description of the Related Art[0005]Due to the recent increase in Internet traffic, to simplify a current network structure in which a packet network, a circuit network, and an optical transport network are mixed, and to ensure a transmission quality of future premium Internet Protocol (IP) multimedia traffic, packet-optical integrated network construction and network control technology development may be required. Particularly, as a synchronous optical networking (SONET) / synchronous digital hierarchy (SDH)-centered optical transpo...

AI Technical Summary

Benefits of technology

[0024]According to a present invention, there is provided an inter-layer path provisioning method and system in a multilayer network that sets a lower layer path, separately from setting of an upper layer, thereby guaranteeing independence of a path computation unit existing for each layer, and protecting inter-layer path information.

[0025]According to a present invention, there is provided an inter-layer path provisioning method and system in a multilayer network that enables an unconnected virtual link, that is, a link of a second type, in topology information between an upper layer path and a lower layer path to be selectively used on the upper layer path by an operator, thereby reducing complexity in path computation.

Problems solved by technology

When path setting between multi-layers is performed by conventional path computation technologies and path control technologies, problems in topology management between the upper layer and the lower layer are generated.

However, all virtual TE links are reflected on the upper layer, and thereby complexity is increased, and a path computation performance of the upper layer is deteriorated.

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